dynamical electric matrix: [ERROR] n_t_CPU > n_blocks=M*(N+1

[davide.tiana]

Dear yamboers
I am trying to calculate the band gap using cohsex.
When I try to run yambo I obtain this the subject error

[ERROR] STOP signal received while in :[05] Dynamical Dielectric Matrix

[ERROR] n_t_CPU > n_blocks=M*(N+1)/2=0 with N=nkibz*n_eh_CPU and M=nkibz/n_k_CPU

I kind of understand/guess it is related to number of CPU.
Hence I a serial run goes through that step
[05] Dynamical Dielectric Matrix
================================

[RD./SAVE//ns.kb_pp_pwscf]----------------------------------
Fragmentation :yes
- S/N 001039 --------------------------- v.04.00.02 r.0090 -

[WARNING] [x,Vnl] slows the Dipoles computation. To neglect it rename the ns.kb_pp file
[WF] Performing Wave-Functions I/O from ./SAVE

How can I set a parallel calculation?

Cheers
Davide

[davide.tiana]

the error was on the parallelisation since I only have 1 q point
using parallelisation only on bands yambo works properly

Sorry about writing a silly post (I couldn't find a way to remove it from the forum)

[Daniele Varsano]

Dear Davide,
no need to remove it. I would leave it as it can be anyway useful for other users.
Best,
Daniele